Index: firmware/App/Controllers/ROPump.c
===================================================================
diff -u -r79161e35b192de494ac072a2772d73c4b55fca94 -r05505352232580a265985678f2d423b5688e8951
--- firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 79161e35b192de494ac072a2772d73c4b55fca94)
+++ firmware/App/Controllers/ROPump.c	(.../ROPump.c)	(revision 05505352232580a265985678f2d423b5688e8951)
@@ -226,7 +226,7 @@
     BOOL result = FALSE;
 
     // First of all, the flow rate must be in range
-    if ( ( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM ) )
+    if ( ( (roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM )) || 0 <= roFlowRate )
     {
         // Then the max pressure that we are allowed to reach must be in range
         if ( ( maxPressure >= MIN_ALLOWED_PRESSURE_PSI ) && ( maxPressure <= MAX_ALLOWED_PRESSURE_PSI ) )
@@ -276,7 +276,7 @@
     BOOL result = FALSE;
 
     // First of all, the flow rate must be in range
-    if ( ( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM ) )
+    if ( (( roFlowRate <= MAX_RO_FLOWRATE_LPM ) && ( roFlowRate >= MIN_RO_FLOWRATE_LPM )) || 0 <= roFlowRate )
     {
         // Then the max pressure that we are allowed to reach must be in range
         if ( ( maxPressure >= MIN_ALLOWED_PRESSURE_PSI ) && ( maxPressure <= MAX_ALLOWED_PRESSURE_PSI ) )
@@ -926,7 +926,7 @@
     if ( TRUE == isTestingActivated() )
     {
         // The flow rate and pressure must be in range
-        if ( ( flow <= MAX_RO_FLOWRATE_LPM ) && ( flow >= MIN_RO_FLOWRATE_LPM ) )
+        if ( (( flow <= MAX_RO_FLOWRATE_LPM ) && ( flow >= MIN_RO_FLOWRATE_LPM ) ) || 0 <= flow )
         {
             result = setROPumpTargetFlowRateLPM( flow, MAX_ALLOWED_PRESSURE_PSI );
         }